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Top 10June 2025

Best Under Gravel Aquarium Filter 5 Gallon

We made a list of the top 10 Under Gravel Aquarium Filter 5 Gallon based on verified reviews, popularity and other factors which we summarized for you in this list.

Best Choice

Penn-Plax Replacement Media (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)

Penn-Plax Replacement Media (2 Pack) – Fits Multi-Pore and Undergravel “E” Filters – Provides Chemical Filtration (FC2)

✓REPLACEMENT FILTER MEDIA: These Cartridges are made to fit the lift tubes of Muti-Pore and Undergravel “E” filters, serving as a replacement for when it’s time to cycle out aquarium filter media. We recommend replacing them once a month.
✓TOP-QUALITY CARTRIDGE: Cartridges come together in a 2 Pack. For best results, replace cartridges every 2 to 4 weeks. They’re lightweight, disposable, and are safe for Freshwater and Saltwater aquariums.
✓CHEMICAL FILTRATION: In addition to absorbing ammonia, nitrites, nitrates, and phosphates in a timely manner, these Cartridges also remove harmful chemicals and toxins, clear up discolorations, and reduce foul odors from your tank.
✓OLD SCHOOL: There has been a burst of growth, development, and ingenuity within the aquatic industry, and although we are a part of this as well, we still provide replacement media for undergravel aquarium setups.
✓SHOP PENN-PLAX FOR ALL YOUR PET’S NEEDS: Penn-Plax is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.

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AquaCity XINYOU Corner Sponge Filter Aquarium Fish Tank Internal Air Driven Filter with Media and Ceramic Ring, XY-2008

AquaCity XINYOU Corner Sponge Filter Aquarium Fish Tank Internal Air Driven Filter with Media and Ceramic Ring, XY-2008

✓Supply the water with much needed oxygen, For tank size up to 5-20 Gallons
✓Dimension: 2-7/8" R x 3-3/4" H

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Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

Penn-Plax Undergravel Aquarium Filter for 15-20 (high) Gallon Tanks – Two 11.2” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

✓NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 15 – 20 (high) gallon aquariums.
✓BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
✓ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system! It’s a filter and bubbler in 1!
✓ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
✓MEASUREMENTS: Each Filter Plate Separately = 11.25” (W) x 11.2” (D) / Filter Plates Together = 22.5” (W) x 11.2” (D) / Each Lift Tube at Filter Plate Base = 12” – 15”
✓COLOR MAY VARY: Please note: the plates that go on the bottom of your tank beneath a layer of gravel or other substrates may be Blue or Black.

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14% Discount

Penn-Plax Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

Penn-Plax Undergravel Aquarium Filter for 20 (Long) - 29 Gallon Tanks – Two 14” x 11.1” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks

✓NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 20 (long) – 29 gallon aquariums.
✓BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
✓ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system. It’s a filter and bubbler in 1.
✓ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 2 Filter Plates, 2 Adjustable Lift Tubes, 2 Straight Airline Tubes, 3 Filter Plate Connecters, and 2 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
✓MEASUREMENTS: Each Filter Plate Separately = 14” (W) x 11.1” (D) / Filter Plates Together = 28” (W) x 11.1” (D) / Each Lift Tube at Filter Plate Base = 13” – 16”

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Penn-Plax Undergravel Aquarium Filter for 40-55 Gallon Tanks – Four 11.25” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks (CFU55)

Penn-Plax Undergravel Aquarium Filter for 40-55 Gallon Tanks – Four 11.25” x 11.25” Plates – Under Gravel System for Clear, Clean Water – Safe for Freshwater and Saltwater Tanks (CFU55)

✓NOTHING LIKE OLD SCHOOL: The Clear-Free Premium Under Gravel Filter is air driven and utilizes an Air Pump (not included) to cycle crystal clear water throughout your aquarium, while keeping a crisp and neat look inside. This means there’s less “moving parts,” making for simplistic and easy maintenance. This filter is suitable for most 40 – 55 gallon aquariums.
✓BIOLOGICAL, CHEMICAL, AND PHYSICAL FILTRATION: As air is pushed through the Air Stones and rises through the Lift Tubes, water is gently suctioned through gravel and the filter plates, allowing both air and water to pass through the Filt-a-Carb Activated Carbon Cartridges. When water continues to be drawn through, anaerobic bacteria collects and colonizes within the gravel and filter plates.
✓ALSO AERATES YOUR TANK: Since the Clear-Free Premium Under Gravel Filter is air driven through the use of Air Stones and an Air Pump (not included), it also aerates your tank. In essence, your aquarium is being filtered and aerated at the same time, though the same system. It’s a filter and bubbler in 1.
✓ITEMS INCLUDED: The Clear-Free Premium Under Gravel Filter includes 4 Filter Plates, 4 Adjustable Lift Tubes, 4 Straight Airline Tubes, 9 Filter Plate Connecters, and 4 Replaceable Filt-a-Carb Activated Carbon Media Cartridges.
✓MEASUREMENTS: Each Filter Plate Separately = 11.25” (W) x 11.25” (D) / Filter Plates Together = 45” (W) x 11.25” (D) / Each Lift Tube at Filter Plate Base = 13.25” – 16.5”

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Tetra Whisper Internal Power Filter 5 To 10 Gallons, For aquariums, In-Tank Filtration With Air Pump, Black

Tetra Whisper Internal Power Filter 5 To 10 Gallons, For aquariums, In-Tank Filtration With Air Pump, Black

✓UNIVERSAL DESIGN Tetra Whisper 10i Internal Filter is an all-in-one air pump and water filter system
✓INTERNAL FILTER Mounts on the inside of your aquarium with clip (included)
✓CATCHES DEBRIS Dense dual-sided mesh filters debris and fish waste
✓AERATES WATER Air-driven design filters up to 80 GPH while oxygenating water
✓CONVENIENT DESIGN Uses medium easy to change Bio-Bag cartridges filter mounts inside aquarium making it possible to place tank flush against the wall

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CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8" X 5.9" Fish Tank Under Gravel Filter

CORISRX BEST OF YOUR LIFESTYLE Undergravel Filter 11.8" X 5.9" Fish Tank Under Gravel Filter

✓Circulate the water under gravel layer in order to reduce the corruption of gravel.
✓The gravel bed provides tremendous surface area for Nitrobacteria and keeps your water crystal clear.
✓The filter plate can be connected with air pump, filter pump, submersible power head and hang-on filter to increase the circulation and help with mechanical and chemical filtration.
✓Adjustable lift tube can be modified at your desire height. Silence design tube head can reduce noise.
✓Air stones will not stock or collapse. Works freshwater and saltwater tanks

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TEHAUX Hexagon Aquarium Undergravel Tank 20pcs Convenient Fish Tank Bottom Plate PVC Splicing Clapboard Bottom Fish Tank Divider Aquarium Stand (Black)

TEHAUX Hexagon Aquarium Undergravel Tank 20pcs Convenient Fish Tank Bottom Plate PVC Splicing Clapboard Bottom Fish Tank Divider Aquarium Stand (Black)

✓Under Gravel Aquarium Hole Design: The fish tank gravel plate is ideal for breeding large dragon fish and sea fish, enhancing the overall aquarium environment
✓Convenient and Practical: The undergravel filter plate is easy to install with a receiving type butt installation and can be cut to fit your specific needs
✓Bottom Filter Material Partition: The plastic mesh panels allow for the separation of filter materials, enabling the combination of different types of media to optimize water flow and stability
✓What You Get: The package includes 20 black grid dividers, each measuring 5.9x5.9x1.06 inches, perfect for gravel filtration in your fish tank
✓Durable Pvc Material: Made from pvc, these undergravel filter plates are slightly submerged and offer good toughness, ensuring long-lasting use in your aquarium

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XMHF Aquarium Fish Tank Bottom Under Gravel Filter Board Plate Plastic 24-Pcs

XMHF Aquarium Fish Tank Bottom Under Gravel Filter Board Plate Plastic 24-Pcs

✓Product Name: Aquarium Under Gravel Filter 24 Pieces
✓Material : Plastic;Each Size : 140 x 70 x 12mm/5.5" x 2.8" x 0.5"(L*W*T)
✓Tube Size(Approx.) : 32 x 2.5cm/ 12.6" x 1"(H*D);Hose Hole Diameter : 5mm/0.2"
✓Air Stone Size : 2.5 x 1.4cm/1" x 0.6"(L*D);Main Color : Black, Clear
✓Weight : 474g; Package Content : 24 x Fish Tank Under Gravel Filter 1 x Tube 1 x Air Hose Line and Air Stone

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TEHAUX 20pcs Aquarium Undergravel Plate - Fish Tank Bottom Filters Plate, Aquarium Sand Divider PVC Gravel Grid Board for Tank Splicing Clapboard Black

TEHAUX 20pcs Aquarium Undergravel Plate - Fish Tank Bottom Filters Plate, Aquarium Sand Divider PVC Gravel Grid Board for Tank Splicing Clapboard Black

✓Fish Tank Bottom Plate: Includes 20pcs black pvc plates, each measuring 15 x 15 x 2.7 cm/5.9 x 5.9 x 1.06 inch, suitable for various aquarium setups
✓Aquarium Bottom Tray Grid: The grid divider is easy to install and features a splicable design, each fish tank divider can be spliced together to large panel
✓Sand And Gravel: Easily cut the fish tank bottom plates to your desired size, allowing for a perfect fit in any fish tank, enhancing the overall functionality and appearance of your aquarium
✓Fish Tank Stone Backing Plate: This product is made of PVC material, hard material is not easy to break, good toughness, can be used in the water for a long time
✓Aquarium Divider Tray: fish tank bottom plate grid The breathable design helps to improve sedimentation and prevent gravel clumping, making it an essential accessory for breeding fish and maintaining a healthy tank

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